Ash removing device



May 30, 1939. 'J MARTlN 2,160,026 I ASH REMOVING DEVICE Filed July 2,1937 ill [77 mfg/7gb 7% I /2 Am Patented May 30, 1939 1 UNITED STATESPATENT OFFICE Germany July 1 (cum-1'11) The invention relates toimprovements in devices for the removal of-the residuary products ofcombustion, as ashes and clinkers, from furnaces and in which the saidresiduary products of combustion are quenched. In particular, theinvention is directed to a device in which a water receptacle, locatedbeneath the discharge chute of the furnace, is provided with a curvedbottom for slidably supporting a reciprocating plunger,

which is adapted to push the residuary products of combustion out of thereceptacle. It has been proposed heretofore, to reciprocate the plungerin its curved path by means of a rack and pinion drive, but such anarrangement is expensive in production and maintenance, since theseparts are subject to wear and have to be replaced periodically.

It is now an object of the invention to provide novel means of simplerand cheaper construction for reciprocating the plunger along the curvedbottom of the receptacle.

Another object of the invention is to construct the novel means forreciprocating the plunger in such a manner that the plunger followsaccurately the curvature of the bottom of the receptacle and remainswith its upper face at a substantially uniform distance from the loweredge of the chute which extends into the receptacle.

These and other objects of the invention are obtained by a crank drivewhich actuates an oscillating link assembly pivoted to one end of the.plunger, while the other end of the plunger engages slidably the bottomof the receptacle. An 'oscillating lever or link guides the plungerduring its reciprocating movement in such manner that the plungerremains always at the same distance from the lower edge of the chute.

In the drawing:

Fig. 1 is a vertical sectional view of the lower portion of a furnaceprovided with the device of the present invention and illustrating bothend positions of the reciprocating plunger, and

Fig. 2 is a horizontal sectional view of the device substantially on thebroken line II]I of Fig. 1. The device is provided with a receptacle Ihaving a curved bottom 2 and spaced parallel side walls. The ash andclinker discharge passage 3 of the furnace is arranged directly abovethe curved bottom 2 of the receptacle I and is provided with a-chute 4which extends downwardly into the receptacle I a sufficient distance sothat the lower edge of the chute 4 lies below the level of the waterbath 5 in the receptacle I.' At one end the bottom 2 of the receptacle Iis connected with an upwardly slanting discharge. trough'i, while theother end of the curved bottom 2 merges into a, straight bottom portionI. The plunger 8 is provided at its forward end with a transverse pushbar 8 which is positioned beneath the chute 4 and rests upon the curvedbottom 2 of the receptacle and is guided by the latter. The plunger 8includes two bars I 8 and I I to which the transverse push bar 8 isattached and which are provided with a cover plate I2. The rear endsWhen the motor I9 is set in operation the push bar 9 of plunger 8 isreciprocated within the limits of the curved bottom 2 of the receptacle.Fig. 1 shows in full lines the plunger 8 in its foremost position, whilethe rearmost position is indicated in dotted lines. The angular relationof the lever arm I3 with respect to the bars I II and I I is selected insuch manner, that the plunger 8, whose front portion engages slidablythe curved bottom a 2 of the receptacle I, is moved by the lever arm l3to remain at a substantially uniform distance from the lower edge 20 ofthat wall of the chute 4 which is directly above the plunger. Thedistance variations which are admissible between this edge 28 and theupper face of the plunger 8 should not exceed approximately of an inch,to prevent the entrance of clinker pieces in the gap and to avoidjamming. Satisfactory reciprocative movement of the plunger, avoidingundesirable vertical movements of the same relative to the edge 28, isobtained by arranging the lever arm I3 with respect to plunger 8 so thatthe angle between the longitudinal axis of the lever arm I3 and thelongitudinal axis of the plunger 8 during the entire range of movementcontinually remains an acute angle.

The plunger 8 executes its strokes slowly and pushes the quenched ashesand clinkers, dropping from the chute 4 into the receptacle I, upwardlyinto the trough 6, over whose upper edge 22 the ashes and clinkers aredischarged from the device.

Any wear of the device will principally occur in the joints of the leverassembly, but those joints are provided with bushings which can bereplaced easily and at very little cost.

What I claim as my invention is:

In an ash removing device, an ash discharge chute, a receptacle adaptedto be partly filled with water, said receptacle comprising two spacedparallel side walls and a curved bottom wall terminating at one end inan upwardly inclined portion, the upper edge of which is positioned in ahigher plane than the lower edge of the discharge chute, said dischargechute having a wall extending downwardly below the normal water level insaid receptacle, a reciprocating plunger in sliding engagement with saidcurved bottom and adapted to push the ashes dropping onto the bottom ofthe receptacle toward said upwardly inclined portion, said plunger beingprovided with a top wall positioned directly below said discharge chutewhen the plunger has completed its discharge stroke, means forreciprocating said plunger including a horizontal shaft, means foroscillating said shaft about its own axis, and a lever arm on said shaftpivotally connected to the rear end 01 said plunger, said shaftextending transversely through said receptacle and being positionedadjacent said downwardly extending wall in a plane above the plane inwhich said plunger is reciprocated, said lever being attached to saidshaft to extend downward therefrom, and to form an acute angle withrespect to the plunger during its reciprocating movement for causingsaid top wall of said plunger to move past the lower edge of saiddownwardly extending wall of said chute with limited clearance duringthe entire movement of the plunger to prevent the entrance of clinkerand the like between said lower edge and said top wall.

JOSEF MARTIN.

